There are many clinical trials that show promise for certain cancer types. (naturopathiccurrents.com)
Additionally, clinical trials may offer innovative diagnostics or treatment options for certain cancer types. (vetmed.auburn.edu)
«A large majority of cancers present symptomatically, but symptoms may be subtle especially in the early stages in certain cancer types such as gastric, pancreatic or ovarian cancers, as opposed to say a more obvious palpable mass such as in breast cancer.» (sciencedaily.com)